GB652668A - Improvements in or relating to processes of preparing vulcanization accelerators, the vulcanization accelerators resulting from said processes and processes of vulcanizin g rubber - Google Patents
Improvements in or relating to processes of preparing vulcanization accelerators, the vulcanization accelerators resulting from said processes and processes of vulcanizin g rubberInfo
- Publication number
- GB652668A GB652668A GB18493/48A GB1849348A GB652668A GB 652668 A GB652668 A GB 652668A GB 18493/48 A GB18493/48 A GB 18493/48A GB 1849348 A GB1849348 A GB 1849348A GB 652668 A GB652668 A GB 652668A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dithio
- bis
- thiazole
- sulphur
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Synthetic rubbers are vulcanized by heating in the presence of a composition prepared by treating with a base, the heat fusion product of a 2,21-dithio bis thiazole accelerator and sulphur. The preferred thiazole is 2,21-dithio bis benzthiazole, others specified are 2,21-dithio bis 4,5-dimethyl thiazole, 2,21-dithio bis 4-ethyl thiazole, 2,21-dithio bis 4-phenylbenzothiazole, 2,21-dithio bis 6-phenyl benzthiazole and 2,21-dithio bis chlorobenzthiazole. The base, which may be added prior to, during, or after the fusion of the thiazole may consist of an alkali or alkaline earth metal hydroxide, ammonia, cyclohexylamine, benzylamine, piperidine, ethylamine, diethylamine, methyl amine, dimethyl amine, morpholine or methyl cyclohexylamine. The amount of base is normally 0.1 to 1.0 per cent of the weight of the thiazole and sulphur fusion product, which should contain more than 50 per cent of sulphur. The synthetic rubber may be a butadiene-1,3 polymer, or a copolymer of butadiene with styrene or acrylonitrile. In examples, the effect of various of the above compositions was indicated on mixes consisting of GR-S, carbon black, zinc oxide, and sulphur, with the optional addition of stearic acid, hydrocarbons, and N-cyclohexyl 2-benzthiazole sulphenamide. In addition, basic activating accelerators such as diphenyl guanidine, di-o-tolyl guanidine, thiocarbanilide, hexamethylene tetramine, paraphenylene diamine, anhydro formaldehyde aniline, diphenyl guanidine phthalate, triphenyl guanidine, butyl aldehyde aniline, dibutyl amine oleate and dicyclohexylamine oleate may also be added.ALSO:A rubber vulcanizing accelerator is made by treating the composite heat fusion product of a 2,21-dithio bis thiazole accelerator and sulphur with a base. The preferred thiazole is 2,21-dithio bis benzothiazole, other thiazoles specified are 2,21-dithio bis 4,5-dimethyl thiazole, 2,21-dithio bis 4-ethyl thiazole, 2,21-dithio bis 4-phenylbenzothiazole, 2,21-dithio bis 6-phenylbenzothiazole and 2,21-dithio bis chlorobenzthiazole. The base which may be added prior to, during, or after the fusion of the thiazole may consist of an alkali or alkaline earth metal hydroxide, ammonia, cyclohexylamine, benzylamine, piperidine, ethyl amine, diethylamine, methylamine, dimethylamine, morpholine or methyl cyclohexylamine. The amount of base is normally 0.1 to 1.0 per cent of the weight of the sulphide and sulphur fusion product which should contain more than 50 per cent sulphur. Typical vulcanization mixes are described in Group V.ALSO:Natural and synthetic rubbers are vulcanized by heating in the presence of a composition prepared by treating with a base the heat fusion product of a 2,21-dithio-bis-thiazole accelerator and sulphur. The preferred thiazole is 2,21-dithio-bis-benzothiazole, other thiazoles specified are 2,21-dithio-bis-4,5-dimethyl thiazole, 2,21-dithio-bis-4-ethyl thiazole, 2,21-dithio-bis-4-phenylbenzothiazole, 2,21-dithio-bis-6-phenyl-benzothiazole and 2,21-dithio-bis-chlorobenzthiazole. The base, which may be added prior to, during or after the fusion of the thiazole may consist of an alkali or alkaline earth metal hydroxide, ammonia, cyclohexylamine, benzylamine, piperidine, ethylamine, diethylamine, methylamine, dimethylamine, morpholine, or methyl cyclohexylamine. The amount of base is normally 0.1 to 1.0 per cent of the weight of the thiazole and sulphur fusion product which should contain more than 50 per cent of sulphur. The rubbers may be indiarubber, reclaimed rubber, balata, guttapercha, butadiene-1,3 polymer and copolymers of butadiene with styrene or acrylonitrile. In examples, the effect of various of the above compositions was indicated on mixes consisting of smoked sheet rubber or GR-S rubber, carbon black, zinc oxide and sulphur with the optional addition of stearic acid, hydrocarbons and N-cyclohexyl 2 - benzothiazole sulphenamide. In addition basic activating accelerators such as diphenyl guanidine, di-o-tolyl guanidine, thiocarbanilide, hexamethylene tetramine, paraphenylene diamine, anhydroformaldehyde aniline, diphenyl guanidinephthalate, triphenyl guanidine, butylaldehyde aniline, dibutyl amine oleate, and dicyclohexylamine oleate may also be added.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US775959A US2567710A (en) | 1947-09-24 | 1947-09-24 | Accelerating composition |
| US116613A US2591547A (en) | 1947-09-24 | 1949-09-19 | Vulcanization of rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB652668A true GB652668A (en) | 1951-04-25 |
Family
ID=26814417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18493/48A Expired GB652668A (en) | 1947-09-24 | 1948-07-09 | Improvements in or relating to processes of preparing vulcanization accelerators, the vulcanization accelerators resulting from said processes and processes of vulcanizin g rubber |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2591547A (en) |
| GB (1) | GB652668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2879243A (en) * | 1957-04-18 | 1959-03-24 | Us Rubber Co | Compounding of rubber latex with a thiazole accelerator and an alkali dialkyl dithiophosphate and resulting composition |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1544687A (en) * | 1921-12-07 | 1925-07-07 | Goodyear Tire & Rubber | Art of vulcanizing or curing caoutchouc substances |
| US1926740A (en) * | 1932-09-08 | 1933-09-12 | Eagle Picher Lead Company | Method of accelerating the vulcanization of rubber and product thereof |
| US2087200A (en) * | 1936-07-23 | 1937-07-13 | Wingfoot Corp | Vulcanization of rubber |
-
1948
- 1948-07-09 GB GB18493/48A patent/GB652668A/en not_active Expired
-
1949
- 1949-09-19 US US116613A patent/US2591547A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2879243A (en) * | 1957-04-18 | 1959-03-24 | Us Rubber Co | Compounding of rubber latex with a thiazole accelerator and an alkali dialkyl dithiophosphate and resulting composition |
Also Published As
| Publication number | Publication date |
|---|---|
| US2591547A (en) | 1952-04-01 |
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